S-93413A321 1.063" ID x 2.5" OD ASME B18.21.1 Oversized Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 2.5" OD and 1.063" ID for superior surface coverage and reduced surface pressure
• Maximum corrosion resistance provided by black corrosion-resistant coated steel, ideal for harsh industrial environments
• High-strength performance with Grade 8 classification and Rockwell C38 hardness for demanding applications
• Precise dimensional stability with 0.235-0.265" thickness ensuring consistent performance under heavy loads
• Universal compatibility with 1" screw sizes and USS designation for seamless integration into existing systems
• Regulatory compliance assurance meeting ASME B18.21.1 standards for quality and reliability
• Environmental responsibility with RoHS 3 and REACH compliance for sustainable industrial operations

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 USS flat washers deliver exceptional performance in demanding environments. The black corrosion-resistant coated steel construction provides superior protection against rust and degradation, making them ideal for outdoor equipment, structural assemblies, and machinery exposed to moisture or chemicals. With their Rockwell C38 hardness and USS designation, these washers maintain integrity under extreme vibration and heavy loading conditions, preventing fastener loosening and joint failure. The precise 1.063" ID and 2.5" OD dimensions ensure optimal load distribution across mating surfaces, reducing stress concentrations and extending component lifespan in construction, manufacturing, and heavy equipment applications where reliability is paramount.

Specification Summary & Compliance

This heavy-duty flat washer features precise dimensional specifications including 1.063" inner diameter, 2.5" outer diameter, and 0.235-0.265" thickness range, manufactured to USS standards in the inch measurement system. The product complies with ASME B18.21.1 specifications for dimensional accuracy and performance requirements. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring safe use in regulated industrial environments. Designed specifically for use with 1" screw sizes, these washers deliver reliable performance in high-strength applications requiring Grade 8 fastener compatibility.